sin^2 π÷6 + cos^2 π÷3 - tan^2 π÷4
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Answer:
-1/2
Step-by-step explanation:
To make it simpler, maybe you should try converting radians into degrees.
→ sin²30˚ + cos²60˚ - tan²45˚ [θ = rad×180˚/π]
=(1/2)² + (1/2)² - (1)²
=1/4 + 1/4 -1
=1/2 - 1
= -1/2
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