Question

If Cot A = 1 , Find the value of: 5tan square A + 2sin square A -3

Answer 1

GIVEN:

cot A=1

TO FIND:

5tan² A+2sin²A-3

SOLUTION:

cot A=1

then A=45°,     (∵cot 45°=1)

now,

5tan²45°+2sin²45°-3

5(1)²+2(1/√2)²-3

5+(2/2)-3

5+1-3

6-3

⇒3

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