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Grade 11Trigonometry

The absolute value of sin(– 870°) + cosec(– 660°) + tan(– 855°) + 2 cot (840°) + cos (480°) + sec (900°) is equal to (A) 3 (B) 1 (C) 2 (D) – 1

Profile image of mike
11 Years agoGrade 11
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2 Answers

Profile image of grenade
ApprovedApproved Tutor Answer11 Years ago
– sin(810° + 60°) – cosec(720° – 60°) – tan(720° + 135°) + 2 cot(720° + 120°) + cos(360° + 120°)
+ sec(720° + 180°)
– sin(810° + 60°) – cosec(720° – 60°) – tan(135°) + 2 cot(120°) + cos(120°) + sec(180°)
= –1
the then athe absolute value comes to be1
plz aprve
Profile image of mike
11 Years ago
thank u

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