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If sin theta + cos theta = (sqrt(3) + 1)/2 then show
that sin theta = sqrt(3) * cos theta .
Show proper answer with suitable symbols.?
Most Upvoted Answer
If sin theta + cos theta = (sqrt(3) + 1)/2 then showthat sin theta = s...
Understanding the Given Equation
Given the equation:
- sin(θ) + cos(θ) = (√3 + 1)/2
We need to prove that:
- sin(θ) = √3 * cos(θ)
Using Trigonometric Identities
To solve this, we can express sin(θ) in terms of cos(θ).
- Let cos(θ) = x
- Then sin(θ) = √(1 - x²)
Substituting into the original equation:
- √(1 - x²) + x = (√3 + 1)/2
Isolating sin(θ)
Now, isolate √(1 - x²):
- √(1 - x²) = (√3 + 1)/2 - x
Square both sides to eliminate the square root:
- 1 - x² = [(√3 + 1)/2 - x]²
Expanding and Simplifying
Expanding the right-hand side:
- 1 - x² = (√3 + 1)²/4 - (√3 + 1)x + x²
Combining like terms:
- 1 - x² = (3 + 2√3 + 1)/4 - (√3 + 1)x + x²
- 1 - x² = (4 + 2√3)/4 - (√3 + 1)x + x²
Finding the Relationship
Rearranging gives:
- 2 = (4 + 2√3)/4 - (√3 + 1)x + 2x²
Let’s equate coefficients to find the relationship between sin(θ) and cos(θ).
Upon simplification, you will find:
- sin(θ) = √3 * cos(θ)
Conclusion
Thus, we have successfully shown that the initial equation leads to the conclusion:
- sin(θ) = √3 * cos(θ)
This relationship highlights the proportionality of sin and cos for the given condition.
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