Question

Trigonometry ques...........

Answer 1

cos A - sin A+1
$\div cos \: a + sin \: a - 1$
=cosec a+cot a

Answer 2

these r continued questions of next page just prove it
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22) cotx. cot2x – cot2x.cot3x–cot3x.cotx=1
23)tan4x=4tanx(1-tan²x) /1-6tan²x+tan^4x
24)cos4x=1–8sin²xcos²x
25)cos6x=32cos^6x–48cos^4x+18cos²x-1

plz solve these questions from class-11 there r 25 questions
26)prove that cos7x+cos5x/sin7x-sin5x=cotx
*****27)prove that sin5x-2sin3x+sinx/cos5x-cosx=tanx****this question is very important
*****28)tan3xtan2xtanx=tan3x-tan2x-tanx****this question is also very important
29)prove that sin(x+y)/cos(x-y) =
tanx+tany/tanx-tany
30)find the value of (a) sin15°,(b) cos75°(c) tan15°(d) cosec(-1410°) (e) tan19π/3
(f) cot(-15π/4)
31) if cotx=-5/12,x lies in 2nd quadrant,find the value ofs of other five trigonometric functions.
32)draw the graph of sinx, cosx, tanx, cosecx, secx,cotx?
33)write all the values of sin, cos, tan, cos3x, sec, cot of 0°,30°,45°,60°90°
34)cos(x+y) =cosxcosy-sinxsiny proof
35)convert(a) 40°20' and (b) -4 into radian
36)convert 6 rqdians into degree
and plz learn general solution and principle solution and learn cos2x, sin2x, tan2x, cot2x, cos3x, sin3x, tan3x
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if u learn this much it is enough for ur trigonometry chapter
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thank u