Introduction to Trigonometry
CH08 Question Bank
CBSE_CH08_QUESTION_BANK
Grade 10
Question:
Verify that $\sin^2 60^\circ + \cos^2 60^\circ = 1$.
Step-by-Step Solution
Key Concept: Substitute standard values and simplify.
$\sin^260^\circ+\cos^260^\circ=\left(\dfrac{\sqrt3}{2}\right)^2+\left(\dfrac12\right)^2=\dfrac34+\dfrac14$. [1.0 Mark]
$=1$, verified. [1.0 Mark]
Correct Answer:
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