now 360 < alpha < 450 skill its interior the 1st quadrant consequently each and every of the t ratios are +ve. cos(2?) = a million - 2sin^? = a million/7 therfore, sin^? = 6/14 sin? = root[6/14] cos? = root[8/14] tan? = root[6/8] csc? = root[14/6] sec? = root[14/8] cot? = root[8/6]
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I have no idea how you managed to type alpha, so I'm gonna write 'x' instead.
We know, sin^2x+cos^2x=0
or, (sinx-cosx)^2+2.sinx.cosx=0 [ since a^2+b^2=(a-b)^2+2ab ]
or, [sqrt(2)]^2+2.sinx.cosx=0 [ Replacing sinx-cos x with sqrt(2).]
or, 2+2.sinx.cos.x=0
or, 2sinx.cosx=-2
or, sinx.cosx=-2/2
or, sinx.cosx=-1
Therefore, sinx*cosx=-1
Hope this helps!!!
now 360 < alpha < 450 skill its interior the 1st quadrant consequently each and every of the t ratios are +ve. cos(2?) = a million - 2sin^? = a million/7 therfore, sin^? = 6/14 sin? = root[6/14] cos? = root[8/14] tan? = root[6/8] csc? = root[14/6] sec? = root[14/8] cot? = root[8/6]
sina = sqrt(2) + cosa
cosa = sina - sqrt(2)
now multiply them m