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## 10 Questions MCQ Test Mathematics For JEE | Test: Advanced Trigonometric Formula

Description
This mock test of Test: Advanced Trigonometric Formula for JEE helps you for every JEE entrance exam. This contains 10 Multiple Choice Questions for JEE Test: Advanced Trigonometric Formula (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Advanced Trigonometric Formula quiz give you a good mix of easy questions and tough questions. JEE students definitely take this Test: Advanced Trigonometric Formula exercise for a better result in the exam. You can find other Test: Advanced Trigonometric Formula extra questions, long questions & short questions for JEE on EduRev as well by searching above.
QUESTION: 1

Solution:

QUESTION: 2

Solution:

QUESTION: 3

### Find the value of 1 + cos2A.

Solution:

By formula

Cos 2A = Cos²A-Sin²A

Cos²A-Sin²A=Cos²A-(1-Cos²A) =Cos²A -1 +Cos²A=2 Cos²A - 1

so, Cos 2A = 2 Cos²A - 1

QUESTION: 4

What is the value of cos 4x ?

Solution:
QUESTION: 5

What is the value of cos 6X?

Solution:
QUESTION: 6

3 Sin 10° – 4 Sin3 10° = ?

Solution:

3sinA-4sin3A=sin3A
Given, 3 sin 10° - 4 sin 3 10°
So, sin3A i.e sin 30
= ½

QUESTION: 7

=

Solution:
QUESTION: 8

What is the value of Sin 6X ?

Solution:
QUESTION: 9

In a triangle ABC, sin 2A = ?

Solution:

QUESTION: 10

In a triangle ABC, if angle A = 72°, angle B = 48° and c = 9 cm then the Ĉ is

Solution:

In any traingle The sum of 3 sides of a traingle is equal to 180°

Given

A=72°

B=48°

A+B+C=180°

72°+48°+C=180°

C=180°-120°

C=60°